MLB Pipeline is set to release an updated and expanded Draft Top 200 Prospects list later this week, so mavens Jim Callis and Jonathan Mayo focused on the Draft during this week's Pipeline Podcast. As they did in April, they previewed the upcoming list by making selections for each of the first 20 picks of the Draft.

We can't emphasize this enough -- this wasn't a projection of which player each club will take on July 11. Instead, Callis and Mayo tabbed the prospects based on their own personal preferences. They spent four of the first eight choices on high school shortstops, while Vanderbilt right-handers Jack Leiter and Kumar Rocker lasted longer than you might have expected. 

Callis and Mayo break down their thinking for the first 10 picks below. For more detailed analysis and all 20 of their selections, listen to the latest edition of the Pipeline Podcast:

1) Pirates (Mayo): Marcelo Mayer, SS, Eastlake HS (Chula Vista, Calif.)
For me, it was a choice between the two high school shortstops, and with scouts lately telling me they like Mayer because of the surety of his bat, I went in that direction.

2) Rangers (Callis): Jordan Lawlar, SS, Jesuit Prep (Dallas)
I also would have taken Mayer at No. 1, but I'm fine with Lawlar, who is a little more explosive and has five-tool potential.

3) Tigers (Mayo): Jack Leiter, RHP, Vanderbilt
He helped answer some questions about his missed start by dominating Ole Miss last weekend, and he’s still very much in the conversation in the top two picks.

4) Red Sox (Callis): Henry Davis, C, Louisville
Davis is clearly the best offensive player in the college crop, and I want that bat to play as much and as well as possible, so I'd move him from behind the plate and deploy his plus-plus arm at third base or right field.

5) Orioles (Mayo): Brady House, SS, Winder-Barrow HS (Winder, Ga.)
The bat speed and the power to all fields were too much to pass up here. House has the chance to play shortstop, with the offensive profile to fit well at third if a move is necessary.

6) D-backs (Callis): Jackson Jobe, RHP, Heritage Hall HS (Oklahoma City)
High school arms are risky, but Jobe has the best combination of three quality pitches and command in this Draft.

7) Royals (Mayo): Kumar Rocker, RHP, Vanderbilt
We can picture the headline now -- “Pipeline predicts Rocker slide” -- but I’m happy to get the big right-hander and his power repertoire here.

8) Rockies (Callis): Kahlil Watson, SS, Wake Forest (N.C.) HS
While Watson may not be as hyped as the three prep shortstops who went ahead of him, he plays much bigger than his 5-foot-9 frame and could have solid tools across the board.

9) Angels (Mayo): Sal Frelick, OF, Boston College
While he’s not a sexy high-ceiling pick, all Frelick has done is hit while showing he plays a very good center field to boot.

10) Mets (Callis): Harry Ford, C, North Cobb HS (Kennesaw, Ga.)
He offers a fascinating ceiling as a catcher who can play almost anywhere on the diamond with plus speed and solid arm strength -- and he also comes with a lot of bat speed and power potential.

On the MLB Pipeline Podcast, Callis and Mayo are your tour guides through all the unfolding stories and breaking news of baseball's top prospects. Each week, you'll find out about the stars of tomorrow from the guys who know today. Download, subscribe and help others find the show by leaving a rating and review on iTunes or your favorite platform.